MESON Chess Problem Database

Problem Display
PID: 187668 (1R6/3NK3/2p5/3p4/2k1nQnR/1Np3r1/2p1rp1p/3b1B2 w - - 0 1)

Marin y Llovet, Valentin

Deutsche Schachzeitung, 1909

1R6/3NK3/2p5/3p4/2k1nQnR/1Np3r1/2p1rp1p/3b1B2

#2

7 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Se5#
    • 1...Se5
      • 2.Sxe5#
    • 1...Sf6
      • 2.Se5#
    • 1...Sh6
      • 2.Se5#
  • Tries
    • 1.Rxg4?
      • threat
        • 2.Se5#
      • 1...Kd3
        • 2.Se5#
      • 1...d4!
    • 1.Rb4+?
      • 1...Kd3
        • 2.Sc1#
        • 2.Rd4#
      • 1...Kxb4!
    • 1.Qe3?
      • threat
        • 2.Sa5#
        • 2.Qd4#
      • 1...Sxe3
        • 2.Se5#
      • 1...d4
        • 2.Qxd4#
      • 1...Sd2
        • 2.Sa5#
        • 2.Se5#
      • 1...Sc5
        • 2.Sa5#
        • 2.Se5#
      • 1...Sg5
        • 2.Sa5#
        • 2.Se5#
      • 1...Sd6
        • 2.Sa5#
        • 2.Se5#
      • 1...Sef6
        • 2.Sa5#
        • 2.Se5#
      • 1...c5
        • 2.Sa5#
      • 1...Rxe3!
    • 1.Qxe4+?
      • 1...d4
        • 2.Sa5#
      • 1...dxe4!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qd4#
      • 1...Sd2+
        • 2.Se5#
      • 1...Sc5+
        • 2.Se5#
      • 1...Sg5+
        • 2.Se5#
      • 1...Sd6+
        • 2.Se5#
      • 1...Sexf6+
        • 2.Se5#
      • 1...Kd3
        • 2.Qd4#
      • 1...Sgxf6
        • 2.Se5#
      • 1...d4
        • 2.Qxd4#
      • 1...Rd3
        • 2.Sa5#
      • 1...Se5
        • 2.Sxe5#
      • 1...c5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • S(j);N_GUARD::S(E)
    • S(j);N_GUARD::S(E),XS(j)
  • Tries
    • Try
      • R(D);XS(j)
      • Threat
        • S(E)
      • Vars
        • K(h);N_SPINS(i),S_FLIGHT::S(E)
      • Refutation
        • P(k);N_SPINS(i)
    • Try
      • R(G);CHECK
      • Refutation
        • K(h);N_SPINR(c),P-FLIGHT,XR(G)
    • Try
      • Q(C);N_PINS(i)
      • Threat
        • DUALS(2)
      • Vars
        • S(j);N_GUARD,P_SPINS(i),XQ(C)::S(E)
        • P(k);::QAR1(C),XP(k)
        • P(l);::S(B)
      • Refutation
        • R(g);XQ(C)
    • Try
      • Q(C);CHECK,P_SPINQ(C),XS(i)
      • Vars
        • P(k);P_SPINP(k)::S(B)
      • Refutation
        • P(k);XQ(C)
  • Actual
    • Q(C);N_PINS(i)
    • Threat
      • QAR1(C)
    • Vars
      • S(i);CHECK,P_SPINS(j)::S(E)
      • S(i);CHECK,P_SPINS(j),XQ(C)::S(E)
      • K(h);S_FLIGHT::QAR1(C)
      • S(j);N_GUARD,P_SPINS(i),XQ(C)::S(E)
      • P(k);::QAR1(C),XP(k)
      • R(g);N_SPINR(c),SBLOCK::S(B)
      • S(j);N_GUARD,P_SPINS(i)::S(E),XS(j)
      • P(l);OGATE::QAB(C)
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